1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2 /******************************************************************************
3 *
4 * Module Name: excreate - Named object creation
5 *
6 * Copyright (C) 2000 - 2018, Intel Corp.
7 *
8 *****************************************************************************/
9
10 #include <acpi/acpi.h>
11 #include "accommon.h"
12 #include "acinterp.h"
13 #include "amlcode.h"
14 #include "acnamesp.h"
15
16 #define _COMPONENT ACPI_EXECUTER
17 ACPI_MODULE_NAME("excreate")
18 #ifndef ACPI_NO_METHOD_EXECUTION
19 /*******************************************************************************
20 *
21 * FUNCTION: acpi_ex_create_alias
22 *
23 * PARAMETERS: walk_state - Current state, contains operands
24 *
25 * RETURN: Status
26 *
27 * DESCRIPTION: Create a new named alias
28 *
29 ******************************************************************************/
acpi_ex_create_alias(struct acpi_walk_state * walk_state)30 acpi_status acpi_ex_create_alias(struct acpi_walk_state *walk_state)
31 {
32 struct acpi_namespace_node *target_node;
33 struct acpi_namespace_node *alias_node;
34 acpi_status status = AE_OK;
35
36 ACPI_FUNCTION_TRACE(ex_create_alias);
37
38 /* Get the source/alias operands (both namespace nodes) */
39
40 alias_node = (struct acpi_namespace_node *)walk_state->operands[0];
41 target_node = (struct acpi_namespace_node *)walk_state->operands[1];
42
43 if ((target_node->type == ACPI_TYPE_LOCAL_ALIAS) ||
44 (target_node->type == ACPI_TYPE_LOCAL_METHOD_ALIAS)) {
45 /*
46 * Dereference an existing alias so that we don't create a chain
47 * of aliases. With this code, we guarantee that an alias is
48 * always exactly one level of indirection away from the
49 * actual aliased name.
50 */
51 target_node =
52 ACPI_CAST_PTR(struct acpi_namespace_node,
53 target_node->object);
54 }
55
56 /* Ensure that the target node is valid */
57
58 if (!target_node) {
59 return_ACPI_STATUS(AE_NULL_OBJECT);
60 }
61
62 /* Construct the alias object (a namespace node) */
63
64 switch (target_node->type) {
65 case ACPI_TYPE_METHOD:
66 /*
67 * Control method aliases need to be differentiated with
68 * a special type
69 */
70 alias_node->type = ACPI_TYPE_LOCAL_METHOD_ALIAS;
71 break;
72
73 default:
74 /*
75 * All other object types.
76 *
77 * The new alias has the type ALIAS and points to the original
78 * NS node, not the object itself.
79 */
80 alias_node->type = ACPI_TYPE_LOCAL_ALIAS;
81 alias_node->object =
82 ACPI_CAST_PTR(union acpi_operand_object, target_node);
83 break;
84 }
85
86 /* Since both operands are Nodes, we don't need to delete them */
87
88 alias_node->object =
89 ACPI_CAST_PTR(union acpi_operand_object, target_node);
90 return_ACPI_STATUS(status);
91 }
92
93 /*******************************************************************************
94 *
95 * FUNCTION: acpi_ex_create_event
96 *
97 * PARAMETERS: walk_state - Current state
98 *
99 * RETURN: Status
100 *
101 * DESCRIPTION: Create a new event object
102 *
103 ******************************************************************************/
104
acpi_ex_create_event(struct acpi_walk_state * walk_state)105 acpi_status acpi_ex_create_event(struct acpi_walk_state *walk_state)
106 {
107 acpi_status status;
108 union acpi_operand_object *obj_desc;
109
110 ACPI_FUNCTION_TRACE(ex_create_event);
111
112 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_EVENT);
113 if (!obj_desc) {
114 status = AE_NO_MEMORY;
115 goto cleanup;
116 }
117
118 /*
119 * Create the actual OS semaphore, with zero initial units -- meaning
120 * that the event is created in an unsignalled state
121 */
122 status = acpi_os_create_semaphore(ACPI_NO_UNIT_LIMIT, 0,
123 &obj_desc->event.os_semaphore);
124 if (ACPI_FAILURE(status)) {
125 goto cleanup;
126 }
127
128 /* Attach object to the Node */
129
130 status = acpi_ns_attach_object((struct acpi_namespace_node *)
131 walk_state->operands[0], obj_desc,
132 ACPI_TYPE_EVENT);
133
134 cleanup:
135 /*
136 * Remove local reference to the object (on error, will cause deletion
137 * of both object and semaphore if present.)
138 */
139 acpi_ut_remove_reference(obj_desc);
140 return_ACPI_STATUS(status);
141 }
142
143 /*******************************************************************************
144 *
145 * FUNCTION: acpi_ex_create_mutex
146 *
147 * PARAMETERS: walk_state - Current state
148 *
149 * RETURN: Status
150 *
151 * DESCRIPTION: Create a new mutex object
152 *
153 * Mutex (Name[0], sync_level[1])
154 *
155 ******************************************************************************/
156
acpi_ex_create_mutex(struct acpi_walk_state * walk_state)157 acpi_status acpi_ex_create_mutex(struct acpi_walk_state *walk_state)
158 {
159 acpi_status status = AE_OK;
160 union acpi_operand_object *obj_desc;
161
162 ACPI_FUNCTION_TRACE_PTR(ex_create_mutex, ACPI_WALK_OPERANDS);
163
164 /* Create the new mutex object */
165
166 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_MUTEX);
167 if (!obj_desc) {
168 status = AE_NO_MEMORY;
169 goto cleanup;
170 }
171
172 /* Create the actual OS Mutex */
173
174 status = acpi_os_create_mutex(&obj_desc->mutex.os_mutex);
175 if (ACPI_FAILURE(status)) {
176 goto cleanup;
177 }
178
179 /* Init object and attach to NS node */
180
181 obj_desc->mutex.sync_level = (u8)walk_state->operands[1]->integer.value;
182 obj_desc->mutex.node =
183 (struct acpi_namespace_node *)walk_state->operands[0];
184
185 status =
186 acpi_ns_attach_object(obj_desc->mutex.node, obj_desc,
187 ACPI_TYPE_MUTEX);
188
189 cleanup:
190 /*
191 * Remove local reference to the object (on error, will cause deletion
192 * of both object and semaphore if present.)
193 */
194 acpi_ut_remove_reference(obj_desc);
195 return_ACPI_STATUS(status);
196 }
197
198 /*******************************************************************************
199 *
200 * FUNCTION: acpi_ex_create_region
201 *
202 * PARAMETERS: aml_start - Pointer to the region declaration AML
203 * aml_length - Max length of the declaration AML
204 * space_id - Address space ID for the region
205 * walk_state - Current state
206 *
207 * RETURN: Status
208 *
209 * DESCRIPTION: Create a new operation region object
210 *
211 ******************************************************************************/
212
213 acpi_status
acpi_ex_create_region(u8 * aml_start,u32 aml_length,u8 space_id,struct acpi_walk_state * walk_state)214 acpi_ex_create_region(u8 * aml_start,
215 u32 aml_length,
216 u8 space_id, struct acpi_walk_state *walk_state)
217 {
218 acpi_status status;
219 union acpi_operand_object *obj_desc;
220 struct acpi_namespace_node *node;
221 union acpi_operand_object *region_obj2;
222
223 ACPI_FUNCTION_TRACE(ex_create_region);
224
225 /* Get the Namespace Node */
226
227 node = walk_state->op->common.node;
228
229 /*
230 * If the region object is already attached to this node,
231 * just return
232 */
233 if (acpi_ns_get_attached_object(node)) {
234 return_ACPI_STATUS(AE_OK);
235 }
236
237 /*
238 * Space ID must be one of the predefined IDs, or in the user-defined
239 * range
240 */
241 if (!acpi_is_valid_space_id(space_id)) {
242 /*
243 * Print an error message, but continue. We don't want to abort
244 * a table load for this exception. Instead, if the region is
245 * actually used at runtime, abort the executing method.
246 */
247 ACPI_ERROR((AE_INFO,
248 "Invalid/unknown Address Space ID: 0x%2.2X",
249 space_id));
250 }
251
252 ACPI_DEBUG_PRINT((ACPI_DB_LOAD, "Region Type - %s (0x%X)\n",
253 acpi_ut_get_region_name(space_id), space_id));
254
255 /* Create the region descriptor */
256
257 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_REGION);
258 if (!obj_desc) {
259 status = AE_NO_MEMORY;
260 goto cleanup;
261 }
262
263 /*
264 * Remember location in AML stream of address & length
265 * operands since they need to be evaluated at run time.
266 */
267 region_obj2 = acpi_ns_get_secondary_object(obj_desc);
268 region_obj2->extra.aml_start = aml_start;
269 region_obj2->extra.aml_length = aml_length;
270 region_obj2->extra.method_REG = NULL;
271 if (walk_state->scope_info) {
272 region_obj2->extra.scope_node =
273 walk_state->scope_info->scope.node;
274 } else {
275 region_obj2->extra.scope_node = node;
276 }
277
278 /* Init the region from the operands */
279
280 obj_desc->region.space_id = space_id;
281 obj_desc->region.address = 0;
282 obj_desc->region.length = 0;
283 obj_desc->region.node = node;
284 obj_desc->region.handler = NULL;
285 obj_desc->common.flags &=
286 ~(AOPOBJ_SETUP_COMPLETE | AOPOBJ_REG_CONNECTED |
287 AOPOBJ_OBJECT_INITIALIZED);
288
289 /* Install the new region object in the parent Node */
290
291 status = acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_REGION);
292
293 cleanup:
294
295 /* Remove local reference to the object */
296
297 acpi_ut_remove_reference(obj_desc);
298 return_ACPI_STATUS(status);
299 }
300
301 /*******************************************************************************
302 *
303 * FUNCTION: acpi_ex_create_processor
304 *
305 * PARAMETERS: walk_state - Current state
306 *
307 * RETURN: Status
308 *
309 * DESCRIPTION: Create a new processor object and populate the fields
310 *
311 * Processor (Name[0], cpu_ID[1], pblock_addr[2], pblock_length[3])
312 *
313 ******************************************************************************/
314
acpi_ex_create_processor(struct acpi_walk_state * walk_state)315 acpi_status acpi_ex_create_processor(struct acpi_walk_state *walk_state)
316 {
317 union acpi_operand_object **operand = &walk_state->operands[0];
318 union acpi_operand_object *obj_desc;
319 acpi_status status;
320
321 ACPI_FUNCTION_TRACE_PTR(ex_create_processor, walk_state);
322
323 /* Create the processor object */
324
325 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_PROCESSOR);
326 if (!obj_desc) {
327 return_ACPI_STATUS(AE_NO_MEMORY);
328 }
329
330 /* Initialize the processor object from the operands */
331
332 obj_desc->processor.proc_id = (u8) operand[1]->integer.value;
333 obj_desc->processor.length = (u8) operand[3]->integer.value;
334 obj_desc->processor.address =
335 (acpi_io_address)operand[2]->integer.value;
336
337 /* Install the processor object in the parent Node */
338
339 status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0],
340 obj_desc, ACPI_TYPE_PROCESSOR);
341
342 /* Remove local reference to the object */
343
344 acpi_ut_remove_reference(obj_desc);
345 return_ACPI_STATUS(status);
346 }
347
348 /*******************************************************************************
349 *
350 * FUNCTION: acpi_ex_create_power_resource
351 *
352 * PARAMETERS: walk_state - Current state
353 *
354 * RETURN: Status
355 *
356 * DESCRIPTION: Create a new power_resource object and populate the fields
357 *
358 * power_resource (Name[0], system_level[1], resource_order[2])
359 *
360 ******************************************************************************/
361
acpi_ex_create_power_resource(struct acpi_walk_state * walk_state)362 acpi_status acpi_ex_create_power_resource(struct acpi_walk_state *walk_state)
363 {
364 union acpi_operand_object **operand = &walk_state->operands[0];
365 acpi_status status;
366 union acpi_operand_object *obj_desc;
367
368 ACPI_FUNCTION_TRACE_PTR(ex_create_power_resource, walk_state);
369
370 /* Create the power resource object */
371
372 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_POWER);
373 if (!obj_desc) {
374 return_ACPI_STATUS(AE_NO_MEMORY);
375 }
376
377 /* Initialize the power object from the operands */
378
379 obj_desc->power_resource.system_level = (u8) operand[1]->integer.value;
380 obj_desc->power_resource.resource_order =
381 (u16) operand[2]->integer.value;
382
383 /* Install the power resource object in the parent Node */
384
385 status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0],
386 obj_desc, ACPI_TYPE_POWER);
387
388 /* Remove local reference to the object */
389
390 acpi_ut_remove_reference(obj_desc);
391 return_ACPI_STATUS(status);
392 }
393 #endif
394
395 /*******************************************************************************
396 *
397 * FUNCTION: acpi_ex_create_method
398 *
399 * PARAMETERS: aml_start - First byte of the method's AML
400 * aml_length - AML byte count for this method
401 * walk_state - Current state
402 *
403 * RETURN: Status
404 *
405 * DESCRIPTION: Create a new method object
406 *
407 ******************************************************************************/
408
409 acpi_status
acpi_ex_create_method(u8 * aml_start,u32 aml_length,struct acpi_walk_state * walk_state)410 acpi_ex_create_method(u8 * aml_start,
411 u32 aml_length, struct acpi_walk_state *walk_state)
412 {
413 union acpi_operand_object **operand = &walk_state->operands[0];
414 union acpi_operand_object *obj_desc;
415 acpi_status status;
416 u8 method_flags;
417
418 ACPI_FUNCTION_TRACE_PTR(ex_create_method, walk_state);
419
420 /* Create a new method object */
421
422 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_METHOD);
423 if (!obj_desc) {
424 status = AE_NO_MEMORY;
425 goto exit;
426 }
427
428 /* Save the method's AML pointer and length */
429
430 obj_desc->method.aml_start = aml_start;
431 obj_desc->method.aml_length = aml_length;
432 obj_desc->method.node = operand[0];
433
434 /*
435 * Disassemble the method flags. Split off the arg_count, Serialized
436 * flag, and sync_level for efficiency.
437 */
438 method_flags = (u8)operand[1]->integer.value;
439 obj_desc->method.param_count = (u8)
440 (method_flags & AML_METHOD_ARG_COUNT);
441
442 /*
443 * Get the sync_level. If method is serialized, a mutex will be
444 * created for this method when it is parsed.
445 */
446 if (method_flags & AML_METHOD_SERIALIZED) {
447 obj_desc->method.info_flags = ACPI_METHOD_SERIALIZED;
448
449 /*
450 * ACPI 1.0: sync_level = 0
451 * ACPI 2.0: sync_level = sync_level in method declaration
452 */
453 obj_desc->method.sync_level = (u8)
454 ((method_flags & AML_METHOD_SYNC_LEVEL) >> 4);
455 }
456
457 /* Attach the new object to the method Node */
458
459 status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0],
460 obj_desc, ACPI_TYPE_METHOD);
461
462 /* Remove local reference to the object */
463
464 acpi_ut_remove_reference(obj_desc);
465
466 exit:
467 /* Remove a reference to the operand */
468
469 acpi_ut_remove_reference(operand[1]);
470 return_ACPI_STATUS(status);
471 }
472
